90
Setting of acceleration/deceleration time and acceleration/ deceleration pattern
4.7.3 Acceleration/deceleration pattern (Pr. 29)
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 144)
You can set the acceleration/deceleration pattern suitable for application.
Parameter
Number
Name Initial Value Setting Range Description
29
Acceleration/deceleration
pattern selection
0
0 Linear acceleration/ deceleration
1 S-pattern acceleration/deceleration A
2 S-pattern acceleration/deceleration B
(1) Linear acceleration/deceleration (Pr. 29 setting "0", initial value)
For the drive unit operation, the rotation speed is made to change linearly
(linear acceleration/deceleration) to prevent the motor and drive unit from
getting excessive stress to reach the set speed during acceleration,
deceleration, etc. when speed changes. Linear acceleration/deceleration has a
uniform speed/time slope.
(2) S-pattern acceleration/deceleration A (Pr. 29 = "1")
An acceleration/deceleration pattern in which the rated motor speed (3000r/
min) is the point of inflection in an S-pattern curve.
NOTE
The acceleration/deceleration time of the S-pattern acceleration/deceleration A is the time period to reach the rated
motor speed. It is not the time period to reach Pr. 20 Acceleration/deceleration reference speed.
(3) S-pattern acceleration/deceleration B (Pr. 29 = "2")
For prevention of load shifting in conveyor and other applications.
Since acceleration/deceleration is always made in an S shape from current
speed (f2) to target speed (f1), this function eases shock produced at
acceleration/deceleration and is effective for load collapse prevention, etc.
Parameters referred to
Pr. 7 Acceleration time, Pr. 8 Deceleration time, Pr. 20 Acceleration/deceleration reference speed Refer to page 87
Time
Rotation speed
Setting value "0"
[Linear acceleration/
deceleration]
(r/min)
Setting value "1"
[S-pattern acceleration/
deceleration A]
Time
3000
Rotation speed
(r/min)
f1
(r/min)
f2
Set apeed
Time
Rotation speed
Setting value "2"
[S-pattern acceleration/
deceleration B]
(r/min)
